2.5mm Cobalt Hex Driver (tip)

I have tried a lot of drivers, nothing compares to these. They are amazing. do not trust cheap Chinese junk.

Nothing else I have used compares to this. If you want precision and don't want to have to worry about soft metal, this is for you.

These are by far the best tips I have ever used. There uncanny ability to lock on the fastener and not slip is phenomenal and the material makes them last so much longer without wearing out or rounding your fasteners. Also, the 3mm body makes it nice to assemble rod ends on links and check length of both links together without slop. Definitely worth every penny and a must have.